JP4110115B2 - 半導体記憶装置 - Google Patents
半導体記憶装置 Download PDFInfo
- Publication number
- JP4110115B2 JP4110115B2 JP2004120628A JP2004120628A JP4110115B2 JP 4110115 B2 JP4110115 B2 JP 4110115B2 JP 2004120628 A JP2004120628 A JP 2004120628A JP 2004120628 A JP2004120628 A JP 2004120628A JP 4110115 B2 JP4110115 B2 JP 4110115B2
- Authority
- JP
- Japan
- Prior art keywords
- pair
- bit lines
- fbc
- sense
- sense nodes
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
- G11C11/21—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements
- G11C11/34—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices
- G11C11/40—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices using transistors
- G11C11/401—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices using transistors forming cells needing refreshing or charge regeneration, i.e. dynamic cells
- G11C11/4063—Auxiliary circuits, e.g. for addressing, decoding, driving, writing, sensing or timing
- G11C11/407—Auxiliary circuits, e.g. for addressing, decoding, driving, writing, sensing or timing for memory cells of the field-effect type
- G11C11/4076—Timing circuits
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
- G11C11/21—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements
- G11C11/34—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices
- G11C11/40—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices using transistors
- G11C11/401—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices using transistors forming cells needing refreshing or charge regeneration, i.e. dynamic cells
- G11C11/4063—Auxiliary circuits, e.g. for addressing, decoding, driving, writing, sensing or timing
- G11C11/407—Auxiliary circuits, e.g. for addressing, decoding, driving, writing, sensing or timing for memory cells of the field-effect type
- G11C11/409—Read-write [R-W] circuits
- G11C11/4091—Sense or sense/refresh amplifiers, or associated sense circuitry, e.g. for coupled bit-line precharging, equalising or isolating
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
- G11C11/21—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements
- G11C11/34—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices
- G11C11/40—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices using transistors
- G11C11/401—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices using transistors forming cells needing refreshing or charge regeneration, i.e. dynamic cells
- G11C11/4063—Auxiliary circuits, e.g. for addressing, decoding, driving, writing, sensing or timing
- G11C11/407—Auxiliary circuits, e.g. for addressing, decoding, driving, writing, sensing or timing for memory cells of the field-effect type
- G11C11/409—Read-write [R-W] circuits
- G11C11/4097—Bit-line organisation, e.g. bit-line layout, folded bit lines
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C2211/00—Indexing scheme relating to digital stores characterized by the use of particular electric or magnetic storage elements; Storage elements therefor
- G11C2211/401—Indexing scheme relating to cells needing refreshing or charge regeneration, i.e. dynamic cells
- G11C2211/4016—Memory devices with silicon-on-insulator cells
Description
前記FBCに記憶されたデータを読み出す制御を行うセンスアンプと、を備え、
前記センスアンプは、
前記FBCが接続される一対のビット線に対応して設けられる一対のセンスノードと、
前記一対のビット線および前記一対のセンスノードに対応して設けられ、対応する前記一対のセンスノードから前記一対のビット線を介して前記FBCに電流を流す一対の負荷回路と、
前記一対のセンスノード間の電位差が所定値に達したときに、前記一対のセンスノードの電位をラッチするラッチ回路と、
前記ラッチ回路のラッチ出力を所定のタイミングで出力するとともに、前記一対のビット線側に帰還させて前記FBCに再書込みを行う出力制御回路と、を備えることを特徴とする半導体記憶装置が提供される。
図1は本発明の第1の実施形態に係る半導体記憶装置のアレー構成図である。図1の半導体記憶装置は、複数のセルアレイ1と、これら複数のセルアレイ1に対応して設けられるカラムデコーダ2と、各セルアレイ1ごとに設けられるロウデコーダ3と、各セルアレイ1の間および各セルアレイ1の両側に設けられるダブルエンド型のセンスアンプ4とを備えている。
第2の実施形態は、ダミーセル6を用いずにセンス動作を行うものである。
2 カラムデコーダ
3 ロウデコーダ
4 センスアンプ
5 FBC
6 ダミーセル
11 負荷回路
12 ダイナミックラッチ回路
15 出力制御回路
Claims (5)
- フローティングのチャネルボディに多数キャリアを蓄積してデータを記憶するFBC(Floating Body Cell)と、
前記FBCに記憶されたデータを読み出す制御を行うセンスアンプと、を備え、
前記センスアンプは、
前記FBCが接続される一対のビット線に対応して設けられる一対のセンスノードと、
前記一対のビット線および前記一対のセンスノードに対応して設けられ、対応する前記一対のセンスノードから前記一対のビット線を介して前記FBCに電流を流す一対の負荷回路と、
前記一対のセンスノード間の電位差が所定値に達したときに、前記一対のセンスノードの電位をラッチするラッチ回路と、
前記ラッチ回路のラッチ出力を所定のタイミングで出力するとともに、前記一対のビット線側に帰還させて前記FBCに再書込みを行う出力制御回路と、を備えることを特徴とする半導体記憶装置。 - 前記一対の負荷回路は、所定のタイミングで基準電圧から前記一対のセンスノードに同量の電流を流すことが可能なカレントミラー回路を有することを特徴とする請求項1に記載の半導体記憶装置。
- 前記一対のビット線と、対応する前記一対のセンスノードと、の間に接続される一対の転送ゲートを備えることを特徴とする請求項1または2に記載の半導体記憶装置。
- 前記出力制御回路は、前記ラッチ回路のラッチ動作が終了した後、前記転送ゲートを遮断した状態で、前記一対のセンスノードの一方をデータ読み出し時とは逆のビット線と短絡させて前記FBCに再書込みを行うことを特徴とする請求項3に記載の半導体記憶装置。
- 前記一対のビット線のそれぞれに接続され、ワード線により個別に選択可能で、前記FBCとサイズ、形状および電気特性が同一で、予め所定の値が書き込まれる基準セルと、
前記一対のビット線の一方と、隣接する他の一対のビット線の一方と、を所定のタイミングで短絡するビット線短絡回路と、を備え、
前記一対のビット線の一方には、ワード線により選択された前記基準セルが接続され、前記一対のビット線の他方には、他のワード線により選択された前記FBCが接続され、
前記一対のビット線の一方に接続された前記基準セルと、隣接する他の一対のビット線の一方に接続された前記基準セルとの一方には0が、他方には1が書き込まれ、
前記ビット線短絡回路により、短絡されたビット線が中間電位に設定されることを特徴とする請求項1乃至4のいずれかに記載の半導体記憶装置。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004120628A JP4110115B2 (ja) | 2004-04-15 | 2004-04-15 | 半導体記憶装置 |
US10/891,000 US7145811B2 (en) | 2004-04-15 | 2004-07-15 | Semiconductor storage device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004120628A JP4110115B2 (ja) | 2004-04-15 | 2004-04-15 | 半導体記憶装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2005302234A JP2005302234A (ja) | 2005-10-27 |
JP4110115B2 true JP4110115B2 (ja) | 2008-07-02 |
Family
ID=35096108
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2004120628A Expired - Fee Related JP4110115B2 (ja) | 2004-04-15 | 2004-04-15 | 半導体記憶装置 |
Country Status (2)
Country | Link |
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US (1) | US7145811B2 (ja) |
JP (1) | JP4110115B2 (ja) |
Families Citing this family (62)
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2004
- 2004-04-15 JP JP2004120628A patent/JP4110115B2/ja not_active Expired - Fee Related
- 2004-07-15 US US10/891,000 patent/US7145811B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
US7145811B2 (en) | 2006-12-05 |
US20050232043A1 (en) | 2005-10-20 |
JP2005302234A (ja) | 2005-10-27 |
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